android.media.MediaExtractor#getTrackCount ( )源码实例Demo

下面列出了android.media.MediaExtractor#getTrackCount ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： deltachat-android 文件： VideoRecoder.java

@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
  int numTracks = extractor.getTrackCount();
  for (int i = 0; i < numTracks; i++) {
    MediaFormat format = extractor.getTrackFormat(i);
    String mime = format.getString(MediaFormat.KEY_MIME);
    if (audio) {
      if (mime.startsWith("audio/")) {
        return i;
      }
    } else {
      if (mime.startsWith("video/")) {
        return i;
      }
    }
  }
  return -5;
}

源代码2 项目： PhotoMovie 文件： AudioRecordThread.java

private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}

源代码3 项目： pause-resume-video-recording 文件： MoviePlayer.java

/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private static int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}

源代码4 项目： Android-MediaCodec-Examples 文件： ExtractMpegFramesTest.java

/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}

源代码5 项目： Telegram 文件： MediaController.java

public static int findTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}

源代码6 项目： react-native-video-helper 文件： MediaController.java

@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}

源代码7 项目： android-transcoder 文件： MediaExtractorUtils.java

public static TrackResult getFirstVideoAndAudioTrack(MediaExtractor extractor) {
    TrackResult trackResult = new TrackResult();
    trackResult.mVideoTrackIndex = -1;
    trackResult.mAudioTrackIndex = -1;
    int trackCount = extractor.getTrackCount();
    for (int i = 0; i < trackCount; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (trackResult.mVideoTrackIndex < 0 && mime.startsWith("video/")) {
            trackResult.mVideoTrackIndex = i;
            trackResult.mVideoTrackMime = mime;
            trackResult.mVideoTrackFormat = format;
        } else if (trackResult.mAudioTrackIndex < 0 && mime.startsWith("audio/")) {
            trackResult.mAudioTrackIndex = i;
            trackResult.mAudioTrackMime = mime;
            trackResult.mAudioTrackFormat = format;
        }
        if (trackResult.mVideoTrackIndex >= 0 && trackResult.mAudioTrackIndex >= 0) break;
    }
    if (trackResult.mVideoTrackIndex < 0 || trackResult.mAudioTrackIndex < 0) {
        throw new IllegalArgumentException("extractor does not contain video and/or audio tracks.");
    }
    return trackResult;
}

源代码8 项目： VideoCompressor 文件： VideoController.java

@TargetApi(16)
private int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}

源代码9 项目： rtmp-rtsp-stream-client-java 文件： VideoDecoder.java

public boolean initExtractor(String filePath) throws IOException {
  decoding = false;
  videoExtractor = new MediaExtractor();
  videoExtractor.setDataSource(filePath);
  for (int i = 0; i < videoExtractor.getTrackCount() && !mime.startsWith("video/"); i++) {
    videoFormat = videoExtractor.getTrackFormat(i);
    mime = videoFormat.getString(MediaFormat.KEY_MIME);
    if (mime.startsWith("video/")) {
      videoExtractor.selectTrack(i);
    } else {
      videoFormat = null;
    }
  }
  if (videoFormat != null) {
    width = videoFormat.getInteger(MediaFormat.KEY_WIDTH);
    height = videoFormat.getInteger(MediaFormat.KEY_HEIGHT);
    duration = videoFormat.getLong(MediaFormat.KEY_DURATION);
    return true;
    //video decoder not supported
  } else {
    mime = "";
    videoFormat = null;
    return false;
  }
}

源代码10 项目： Android-MediaCodec-Examples 文件： ExtractMpegFramesTest_egl14.java

/**
 * Selects the video track, if any.
 *
 * @return the track index, or -1 if no video track is found.
 */
private int selectTrack(MediaExtractor extractor) {
    // Select the first video track we find, ignore the rest.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (mime.startsWith("video/")) {
            if (VERBOSE) {
                Log.d(TAG, "Extractor selected track " + i + " (" + mime + "): " + format);
            }
            return i;
        }
    }

    return -1;
}

源代码11 项目： mollyim-android 文件： AudioTrackConverter.java

private static int getAndSelectAudioTrackIndex(MediaExtractor extractor) {
    for (int index = 0; index < extractor.getTrackCount(); ++index) {
        if (VERBOSE) {
            Log.d(TAG, "format for track " + index + " is " + MediaConverter.getMimeTypeFor(extractor.getTrackFormat(index)));
        }
        if (isAudioFormat(extractor.getTrackFormat(index))) {
            extractor.selectTrack(index);
            return index;
        }
    }
    return -1;
}

源代码12 项目： media-for-mobile 文件： AudioReader.java

protected int getAndSelectAudioTrackIndex(MediaExtractor extractor) {
    for (int index = 0; index < extractor.getTrackCount(); ++index) {
        if (isAudioFormat(extractor.getTrackFormat(index))) {
            extractor.selectTrack(index);
            return index;
        }
    }
    return -1;
}

源代码13 项目： sdl_java_suite 文件： BaseAudioDecoder.java

protected void initMediaComponents() throws Exception {
    if(targetSampleRate <= 0){
        throw new InstantiationException("Target sample rate of " + targetSampleRate + " is unsupported");
    }

    extractor = new MediaExtractor();
    Context contextRef = contextWeakReference.get();
    if(contextRef == null){
        throw new InstantiationException("Context reference was null");
    }
    extractor.setDataSource(contextRef, audioSource, null);
    MediaFormat format = null;
    String mime = null;

    // Select the first audio track we find.
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; ++i) {
        MediaFormat f = extractor.getTrackFormat(i);
        String m = f.getString(MediaFormat.KEY_MIME);
        if (m.startsWith("audio/")) {
            format = f;
            mime = m;
            extractor.selectTrack(i);
            break;
        }
    }

    if (mime == null) {
        throw new Exception("The audio file " + audioSource.getPath() + " doesn't contain an audio track.");
    }

    decoder = MediaCodec.createDecoderByType(mime);
    decoder.configure(format, null, null, 0);
}

源代码14 项目： SimpleVideoEditor 文件： AudioTransCoder.java

private void prepare() throws IOException {
    extractor = new MediaExtractor();
    extractor.setDataSource(mInputFile.getAbsolutePath());
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mine = format.getString(MediaFormat.KEY_MIME);
        if (!TextUtils.isEmpty(mine) && mine.startsWith("audio")) {
            extractor.selectTrack(i);
            if (mDurationMs == 0) {
                try {
                    mDurationMs = format.getLong(MediaFormat.KEY_DURATION) / 1000;
                } catch (Exception e) {
                    e.printStackTrace();
                    MediaPlayer mediaPlayer = new MediaPlayer();
                    mediaPlayer.setDataSource(mInputFile.getAbsolutePath());
                    mediaPlayer.prepare();
                    mDurationMs = mediaPlayer.getDuration();
                    mediaPlayer.release();
                }
            }

            if (mDurationMs == 0) {
                throw new IllegalStateException("We can not get duration info from input file: " + mInputFile);
            }

            decoder = MediaCodec.createDecoderByType(mine);
            decoder.configure(format, null, null, 0);
            decoder.start();
            break;
        }
    }
}

源代码15 项目： SimpleVideoEditor 文件： VideoBgmAddAction.java

private String getBgmMime() throws IOException {
    String mine = null;

    MediaExtractor extractor = new MediaExtractor();
    extractor.setDataSource(mBgmFile.getAbsolutePath());
    for (int i = 0; i < extractor.getTrackCount(); i++) {
        MediaFormat mediaFormat = extractor.getTrackFormat(i);
        if (mediaFormat.getString(MediaFormat.KEY_MIME).startsWith("audio")) {
            mine = mediaFormat.getString(MediaFormat.KEY_MIME);
            break;
        }
    }

    return mine;
}

源代码16 项目： VideoProcessor 文件： VideoUtil.java

public static int selectTrack(MediaExtractor extractor, boolean audio) {
    int numTracks = extractor.getTrackCount();
    for (int i = 0; i < numTracks; i++) {
        MediaFormat format = extractor.getTrackFormat(i);
        String mime = format.getString(MediaFormat.KEY_MIME);
        if (audio) {
            if (mime.startsWith("audio/")) {
                return i;
            }
        } else {
            if (mime.startsWith("video/")) {
                return i;
            }
        }
    }
    return -5;
}

源代码17 项目： AndroidVideoSamples 文件： MediaCodecDecodeController.java

private void setupExtractor() {
   mExtractor = new MediaExtractor();
   try {
      mExtractor.setDataSource( mUri.toString() );
   } catch ( IOException e ) {
      e.printStackTrace();
   }

   int videoIndex = 0;

   for ( int trackIndex = 0; trackIndex < mExtractor.getTrackCount(); trackIndex++ ) {
      MediaFormat format = mExtractor.getTrackFormat( trackIndex );

      String mime = format.getString( MediaFormat.KEY_MIME );
      if ( mime != null ) {
         if ( mime.equals( "video/avc" ) ) {
            mExtractor.selectTrack( trackIndex );
            videoIndex = trackIndex;
            break;
         }
      }
   }

   mDecoder = MediaCodec.createDecoderByType( "video/avc" );
   mDecoder.configure( mExtractor.getTrackFormat( videoIndex ), mSurface, null, 0 );
   mDecoder.start();

   mInfo = new BufferInfo();

   mInputBuffers = mDecoder.getInputBuffers();
   mOutputBuffers = mDecoder.getOutputBuffers();
}

源代码18 项目： AAVT 文件： Mp4Provider.java

private boolean extractMedia(){
    if(mPath==null||!new File(mPath).exists()){
        //文件不存在
        return false;
    }
    try {
        MediaMetadataRetriever mMetRet=new MediaMetadataRetriever();
        mMetRet.setDataSource(mPath);
        mVideoTotalTime=Long.valueOf(mMetRet.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
        mExtractor=new MediaExtractor();
        mExtractor.setDataSource(mPath);
        int trackCount=mExtractor.getTrackCount();
        for (int i=0;i<trackCount;i++){
            MediaFormat format=mExtractor.getTrackFormat(i);
            String mime=format.getString(MediaFormat.KEY_MIME);
            if(mime.startsWith("audio")){
                mAudioDecodeTrack=i;
            }else if(mime.startsWith("video")){
                mVideoDecodeTrack=i;
                int videoRotation=0;
                String rotation=mMetRet.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
                if(rotation!=null){
                    videoRotation=Integer.valueOf(rotation);
                }
                if(videoRotation%180!=0){
                    mVideoSize.y=format.getInteger(MediaFormat.KEY_WIDTH);
                    mVideoSize.x=format.getInteger(MediaFormat.KEY_HEIGHT);
                }else{
                    mVideoSize.x=format.getInteger(MediaFormat.KEY_WIDTH);
                    mVideoSize.y=format.getInteger(MediaFormat.KEY_HEIGHT);
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

源代码19 项目： mollyim-android 文件： VideoThumbnailsExtractor.java

static void extractThumbnails(final @NonNull MediaInput input,
                              final int thumbnailCount,
                              final int thumbnailResolution,
                              final @NonNull Callback callback)
{
  MediaExtractor extractor     = null;
  MediaCodec     decoder       = null;
  OutputSurface  outputSurface = null;
  try {
    extractor = input.createExtractor();
    MediaFormat mediaFormat = null;
    for (int index = 0; index < extractor.getTrackCount(); ++index) {
      if (extractor.getTrackFormat(index).getString(MediaFormat.KEY_MIME).startsWith("video/")) {
        extractor.selectTrack(index);
        mediaFormat = extractor.getTrackFormat(index);
        break;
      }
    }
    if (mediaFormat != null) {
      final String mime     = mediaFormat.getString(MediaFormat.KEY_MIME);
      final int    rotation = mediaFormat.containsKey(MediaFormat.KEY_ROTATION) ? mediaFormat.getInteger(MediaFormat.KEY_ROTATION) : 0;
      final int    width    = mediaFormat.getInteger(MediaFormat.KEY_WIDTH);
      final int    height   = mediaFormat.getInteger(MediaFormat.KEY_HEIGHT);
      final int    outputWidth;
      final int    outputHeight;

      if (width < height) {
        outputWidth  = thumbnailResolution;
        outputHeight = height * outputWidth / width;
      } else {
        outputHeight = thumbnailResolution;
        outputWidth  = width * outputHeight / height;
      }

      final int outputWidthRotated;
      final int outputHeightRotated;

      if ((rotation % 180 == 90)) {
        //noinspection SuspiciousNameCombination
        outputWidthRotated = outputHeight;
        //noinspection SuspiciousNameCombination
        outputHeightRotated = outputWidth;
      } else {
        outputWidthRotated  = outputWidth;
        outputHeightRotated = outputHeight;
      }

      Log.i(TAG, "video: " + width + "x" + height + " " + rotation);
      Log.i(TAG, "output: " + outputWidthRotated + "x" + outputHeightRotated);

      outputSurface = new OutputSurface(outputWidthRotated, outputHeightRotated, true);

      decoder = MediaCodec.createDecoderByType(mime);
      decoder.configure(mediaFormat, outputSurface.getSurface(), null, 0);
      decoder.start();

      long duration = 0;

      if (mediaFormat.containsKey(MediaFormat.KEY_DURATION)) {
        duration = mediaFormat.getLong(MediaFormat.KEY_DURATION);
      } else {
        Log.w(TAG, "Video is missing duration!");
      }

      callback.durationKnown(duration);

      doExtract(extractor, decoder, outputSurface, outputWidthRotated, outputHeightRotated, duration, thumbnailCount, callback);
    }
  } catch (IOException | TranscodingException e) {
    Log.w(TAG, e);
    callback.failed();
  } finally {
    if (outputSurface != null) {
      outputSurface.release();
    }
    if (decoder != null) {
      decoder.stop();
      decoder.release();
    }
    if (extractor != null) {
      extractor.release();
    }
  }
}

源代码20 项目： Android 文件： MainActivity.java

protected boolean process() throws IOException {

        mMediaExtractor = new MediaExtractor();          
        mMediaExtractor.setDataSource(SDCARD_PATH+"/input.mp4");                
                
        int mVideoTrackIndex = -1;
        int framerate = 0;
        for(int i = 0; i < mMediaExtractor.getTrackCount(); i++) {
            MediaFormat format = mMediaExtractor.getTrackFormat(i);
            String mime = format.getString(MediaFormat.KEY_MIME);
            if(!mime.startsWith("video/")) {                
                continue;
            }
            framerate = format.getInteger(MediaFormat.KEY_FRAME_RATE);            
            mMediaExtractor.selectTrack(i);
            mMediaMuxer = new MediaMuxer(SDCARD_PATH+"/ouput.mp4", OutputFormat.MUXER_OUTPUT_MPEG_4);
            mVideoTrackIndex = mMediaMuxer.addTrack(format);  
            mMediaMuxer.start();
        }
        
        if(mMediaMuxer == null) {
            return false;
        }
        
        BufferInfo info = new BufferInfo();
        info.presentationTimeUs = 0;
        ByteBuffer buffer = ByteBuffer.allocate(500*1024);        
        while(true) {
            int sampleSize = mMediaExtractor.readSampleData(buffer, 0);
            if(sampleSize < 0) {
                break;
            }
            mMediaExtractor.advance();
            info.offset = 0;
            info.size = sampleSize;
            info.flags = MediaCodec.BUFFER_FLAG_SYNC_FRAME;        
            info.presentationTimeUs += 1000*1000/framerate;
            mMediaMuxer.writeSampleData(mVideoTrackIndex,buffer,info);
        }

        mMediaExtractor.release();
        
        mMediaMuxer.stop();
        mMediaMuxer.release();
        
        return true;
    }

方法所在类

android.media.MediaExtractor